CN109392056B

CN109392056B - Method for accessing terminal to core network, base station and terminal

Info

Publication number: CN109392056B
Application number: CN201710656723.0A
Authority: CN
Inventors: 全海洋; 梁靖
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2017-08-03
Filing date: 2017-08-03
Publication date: 2020-10-13
Anticipated expiration: 2037-08-03
Also published as: JP2020529784A; CN109392056A; KR20200032205A; KR102351412B1; EP3664519A1; EP3664519A4; US20200236682A1; WO2019024617A1; JP6995976B2; EP3664519B1; US11246140B2

Abstract

The invention provides a method for accessing a terminal into a core network, a base station and a terminal, wherein the method for accessing the terminal into the core network comprises the following steps: sending Public Land Mobile Network (PLMN) indication information of a base station to a terminal, wherein the PLMN indication information comprises PLMN information connected with a first type core network and PLMN information connected with a second type core network; receiving information of a target PLMN which is selected by the terminal according to the PLMN indication information and is matched with the terminal, and determining a target core network to which the terminal is accessed according to the information of the target PLMN; and interacting with the target core network and the terminal to enable the terminal to access the target core network through the target PLMN. Therefore, the scheme of the invention solves the problem that the accessed core network can not be selected when the terminal is accessed to the network in the network architecture of the double core network in the prior art.

Description

Method for accessing terminal to core network, base station and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method for accessing a terminal to a core network, a base station, and a terminal.

Background

In the process of transition from 4G to 5G in a Long Term Evolution (Long Term Evolution, LTE for short) system, there is a scenario that an enhanced LTE base station (hereinafter referred to as an LTE base station) may be connected to both a 4G core network and a 5G core network.

The network architecture diagram of the lte may have the following three types:

the first method comprises the following steps: and only connecting to an Evolved Packet Core (EPC for short), namely a 4G Core network, wherein the architecture of the Core network is consistent with that in 36.300.

Wherein, a network architecture of an evolved universal terrestrial radio access network (E-UTRAN) is shown in fig. 1: the E-UTRAN consists of base stations (Evolved Node Bs, abbreviated eNBs). The eNB completes an access network function and communicates with a User Equipment (UE) over an air interface. There is both a control plane connection and a user plane connection between the UE and the eNB. For each UE attached to the network, a Mobility Management Entity (MME) provides services for the UE, and the MME and the eNB are connected by using an S1-MME interface. The S1-MME interface provides control plane services for the UE, including mobility management and bearer management functions.

The Serving GateWay (S-GW) is connected with the eNB by adopting an S1-U interface, and for each UE attached to the network, one S-GW provides services for the UE. The S1-U interface provides user plane service for the UE, and user plane data of the UE is transmitted between the S-GW and the eNB through the S1-U bearer.

And the second method comprises the following steps: as shown in fig. 2, the network architecture of the dual core network may be connected to EPC and 5GC (5G core network) at the same time.

And the third is that: as shown in fig. 3, is a network architecture connected to only 5 GCs.

However, in the network architecture shown in fig. 2, since the lte base station is connected to two core networks, when the terminal accesses the network, the core network needs to be selected. However, there is currently no clear solution to this problem.

Disclosure of Invention

The embodiment of the invention provides a method for accessing a terminal into a core network, a base station and a terminal, wherein the base station sends PLMN information connected with a first type of core network and PLMN information connected with a second type of core network to the terminal, so that the terminal selects a target PLMN matched with the terminal from the PLMNs, and further determines the core network accessed by the terminal according to the target PLMN selected by the terminal, thereby solving the problem that the accessed core network cannot be selected when the terminal is accessed into the network in the network architecture of double core networks in the prior art.

The embodiment of the invention provides a method for accessing a terminal to a core network, which comprises the following steps:

sending Public Land Mobile Network (PLMN) indication information of a base station to a terminal, wherein the PLMN indication information comprises PLMN information connected with a first type core network and PLMN information connected with a second type core network;

receiving information of a target PLMN which is selected by the terminal according to the PLMN indication information and is matched with the terminal, and determining a target core network to which the terminal is accessed according to the information of the target PLMN;

and interacting with the target core network and the terminal to enable the terminal to access the target core network through the target PLMN.

In the foregoing solution, the step of sending the PLMN indication information of the base station to the terminal includes:

and sending a first PLMN list and a second PLMN list to a terminal, wherein the first PLMN list comprises PLMN information connected with a first type core network, and the second PLMN list comprises PLMN information connected with a second type core network.

sending a third PLMN list, first indication information of the third PLMN list and a fourth PLMN list to a terminal;

the third PLMN list comprises PLMN information only connected with a first type core network and PLMN information connected with the first type core network and a second type core network;

the first indication information is used for indicating whether the PLMN in the third PLMN list is connected with a second type core network;

and the fourth PLMN list comprises PLMN information only connected with a second type core network.

In the foregoing scheme, the PLMN indication information further includes: the priority core network indicating information is used for indicating a priority core network of a PLMN connecting a first type core network and a second type core network, and the priority core network is the first type core network or the second type core network.

In the foregoing scheme, the PLMN indication information further includes: a tracking area code under each PLMN and/or a cell identification under each PLMN.

In the above scheme, when the target PLMN is connected to the first type core network and the second type core network, the information of the target PLMN includes second indication information for indicating that the target PLMN is connected to the first type core network and the second type core network;

the step of receiving information of a target PLMN which is selected by the terminal according to the PLMN indication information and is matched with the terminal, and determining a target core network to which the terminal is to access according to the information of the target PLMN comprises the following steps:

receiving information of a target PLMN which is selected by the terminal according to the PLMN indication information and is matched with the terminal, and third indication information used for indicating whether the terminal needs to be accessed to a second type core network;

and determining a target core network to which the terminal is to access according to the third indication information and the second indication information included in the information of the target PLMN.

In the above scheme, the method further includes:

receiving information of a preferred PLMN supported by the terminal and a preferred core network reported by the terminal, wherein the preferred core network is a first type core network or a second type core network;

when the terminal moves out of the base station, the base station selects a target base station supporting the preferred PLMN and the preferred core network, and informs the target base station to perform resource configuration for the terminal, so that the terminal is switched to the target base station.

The embodiment of the invention also provides a method for accessing the terminal to the core network, which comprises the following steps:

receiving PLMN indication information of a base station, which is sent by the base station, wherein the PLMN indication information comprises PLMN information connected with a first type core network and PLMN information connected with a second type core network;

selecting a target PLMN matched with the terminal according to the PLMN indication information;

and sending the information of the target PLMN to the base station.

In the foregoing solution, the step of receiving PLMN indication information of the base station sent by the base station includes:

receiving a first PLMN list and a second PLMN list sent by a base station, wherein the first PLMN list comprises PLMN information connected with a first type core network, and the second PLMN list comprises PLMN information connected with a second type core network.

receiving a third PLMN list, first indication information of the third PLMN list and a fourth PLMN list sent by a base station;

the step of sending the information of the target PLMN to the base station includes:

and sending the information of the target PLMN including the second indication information and third indication information used for indicating whether the terminal needs to access a second type core network to the base station.

In the above scheme, the method further includes:

reporting information of a preferred PLMN supported by the terminal and a preferred core network to the base station, so that when the terminal moves out of the base station, the base station selects a target base station supporting the preferred PLMN and the preferred core network for the terminal, and informs the target base station of performing resource configuration for the terminal, so that the terminal is switched to the target base station;

wherein the preferred core network is a first type core network or a second type core network.

An embodiment of the present invention further provides a base station, including:

an indication information sending module, configured to send PLMN indication information of a base station to a terminal, where the PLMN indication information includes PLMN information connected to a first type core network and PLMN information connected to a second type core network;

a target core network determining module, configured to receive information of a target PLMN, which is selected by the terminal according to the PLMN indication information and matches the terminal, and determine a target core network to which the terminal is to access according to the information of the target PLMN;

and the access module is used for interacting with the target core network and the terminal so that the terminal can access the target core network through the target PLMN.

In the foregoing solution, the indication information sending module includes:

the first sending unit is configured to send a first PLMN list and a second PLMN list to the terminal, where the first PLMN list includes PLMN information for connecting a first type core network, and the second PLMN list includes PLMN information for connecting a second type core network.

In the foregoing solution, the indication information sending module includes:

a second sending unit, configured to send a third PLMN list, first indication information of the third PLMN list, and a fourth PLMN list to a terminal;

the target core network determining module comprises:

an information receiving unit, configured to receive information of a target PLMN, which is selected by the terminal according to the PLMN indication information and matches the terminal, and third indication information used for indicating whether the terminal needs to access a second type core network;

and a target core network determining unit, configured to determine a target core network to which the terminal is to access, according to the third indication information and the second indication information included in the information of the target PLMN.

In the foregoing scheme, the base station further includes:

an information receiving module, configured to receive information of a preferred PLMN supported by the terminal and a preferred core network, where the preferred core network is a first type core network or a second type core network, and the information is reported by the terminal;

and the target base station determining module is used for controlling the base station to select a target base station supporting the preferred PLMN and the preferred core network when the terminal moves out of the base station, and informing the target base station to perform resource configuration on the terminal so as to switch the terminal to the target base station.

An embodiment of the present invention further provides a terminal, including:

the system comprises an indication information receiving module, a first type core network sending module and a second type core network sending module, wherein the indication information receiving module is used for receiving PLMN indication information of a base station, which is sent by the base station, and the PLMN indication information comprises PLMN information connected with a first type core network and PLMN information connected with a second type core network;

the PLMN selection module is used for selecting a target PLMN matched with the terminal according to the PLMN indication information;

and the feedback information sending module is used for sending the information of the target PLMN to the base station.

In the foregoing solution, the indication information receiving module includes:

the first receiving unit is configured to receive a first PLMN list and a second PLMN list sent by a base station, where the first PLMN list includes PLMN information connected to a first type core network, and the second PLMN list includes PLMN information connected to a second type core network.

a second receiving unit, configured to receive a third PLMN list, first indication information of the third PLMN list, and a fourth PLMN list sent by a base station;

the feedback information sending module is specifically configured to:

In the foregoing scheme, the terminal further includes:

an information reporting module, configured to report, to the base station, information of a preferred PLMN and a preferred core network supported by the terminal, so that when the terminal moves out of the base station, the base station selects a target base station supporting the preferred PLMN and the preferred core network for the terminal, and notifies the target base station of performing resource configuration for the terminal, so that the terminal is switched to the target base station;

An embodiment of the present invention further provides a base station, including a first memory, a first processor, and a computer program stored on the first memory and executable on the first processor; the first processor, when executing the program, implements the steps of:

An embodiment of the present invention further provides a terminal, including a second memory, a second processor, and a computer program stored on the second memory and executable on the second processor; the second processor, when executing the program, implements the steps of:

and sending the information of the target PLMN to the base station.

Embodiments of the present invention also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of:

and sending the information of the target PLMN to the base station.

The embodiment of the invention has the beneficial effects that:

according to the embodiment of the invention, the PLMN information connected with the first type core network and the PLMN information connected with the second type core network are sent to the terminal through the base station, so that the terminal selects the target PLMN matched with the terminal from the PLMNs, and further determines the core network accessed by the terminal according to the target PLMN selected by the terminal. Therefore, the embodiment of the invention solves the problem that the accessed core network cannot be selected when the terminal is accessed to the network in the network architecture of the dual-core network in the prior art.

Drawings

FIG. 1 shows a network architecture diagram of E-UTRAN in the prior art;

fig. 2 shows a network architecture diagram of a dual core network in the prior art;

fig. 3 shows a prior art network architecture diagram connected only to a 5G core network;

fig. 4 is a flowchart illustrating a method for a base station side terminal to access a core network according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating a method for a terminal to access a core network according to an embodiment of the present invention;

fig. 6 is a schematic diagram illustrating an embodiment of a method for a terminal to access a core network;

fig. 7 is a block diagram of a base station according to an embodiment of the present invention;

fig. 8 shows a block diagram of a terminal according to an embodiment of the present invention;

fig. 9 is a block diagram showing a configuration of a base station according to an embodiment of the present invention;

fig. 10 shows a block diagram of a terminal according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

In addition, the terms "system" and "network" are often used interchangeably herein.

In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

Specifically, embodiments of the present invention provide a method for accessing a terminal to a core network, a base station, and a terminal, which solve the problem in the prior art that when a terminal accesses a network in a network architecture of a dual-core network, the accessed core network cannot be selected.

First embodiment

As shown in fig. 4, an embodiment of the present invention provides a method for a terminal to access a core network, which specifically includes the following steps:

step 41: and sending the public land mobile network PLMN indication information of the base station to the terminal.

The PLMN indication information comprises PLMN information connected with a first type core network and PLMN information connected with a second type core network. Wherein, there may be an intersection between a PLMN connected to a first type of core network and a PLMN connected to a second type of core network, i.e. there may be a PLMN connected to both the first type of core network and the second type of core network. In addition, the first type core network may be a 4G core network, and the second type core network may be a 5G core network.

The PLMN indication information may be specifically sent to the terminal in a broadcast manner. Of course, the specific transmission form for the PLMN indication information is not limited thereto.

In addition, the specific transmission form of the PLMN information connected to the first type core network and the PLMN information connected to the second type core network may be performed in the following two ways:

the first method is as follows: preferably, step 41 comprises:

The first PLMN list may be an existing PLMN list, and the second PLMN list is a newly added PLMN list. The existing PLMN list may be used to carry information about PLMNs connected to the first type of core network and a new PLMN list may be added to provide information about PLMNs connected to the second core network.

Specifically, for example, it is assumed that the base station is shared by multiple operators, and core networks connected by different operators are different. For example, PLMN 1 is connected to only 4G core network, PLMN 2 and PLMN 3 may be connected to two core networks, 4G and 5G, and PLMN 4 is connected to only 5G core network. The information of PLMN 1, PLMN 2, PLMN 3 is provided in the first PLMN list and the information of PLMN 2, PLMN 3, PLMN 4 is provided in the second PLMN list.

The second method comprises the following steps: preferably, step 41 comprises:

sending a third PLMN list, first indication information of the third PLMN list and a fourth PLMN list to a terminal; the third PLMN list comprises PLMN information only connected with a first type core network and PLMN information connected with the first type core network and a second type core network; the first indication information is used for indicating whether the PLMN in the third PLMN list is connected with a second type core network; and the fourth PLMN list comprises PLMN information only connected with a second type core network.

The third PLMN list may be an existing PLMN list, and the fourth PLMN list is a newly added PLMN list. That is, the information of the PLMN connected to the first type core network and the information of the PLMN connected to the two core networks, i.e., the first type core network and the second type core network, are carried by the existing PLMN list, and an individual bit stream (bitmap) is added to indicate whether each PLMN corresponding to the list is connected to the second type core network, and an individual list is added to carry the information of the PLMN connected only to the second type core network.

Specifically, for example, it is assumed that the base station is shared by multiple operators, and core networks connected by different operators are different. For example, PLMN 1 is connected to only 4G core network, PLMN 2 and PLMN 3 may be connected to two core networks, 4G and 5G, and PLMN 4 is connected to only 5G core network. Then the information of PLMN 1, PLMN 2, PLMN 3 is provided in the third PLMN list and 011 is provided in bitmap, where 0 means that connection to the 5G core network is not supported and 1 means that connection to the 5G core network is also supported. The first bit corresponds to the first PLMN in the third PLMN list, the second bit corresponds to the second PLMN in the third PLMN list, and so on. Information of a PLMN connected only to the 5G core network, i.e. information of PLMN 4, is provided in the fourth PLMN list.

Furthermore, since there may be an intersection between a PLMN connected to a first type of core network and a PLMN connected to a second type of core network, i.e. there may be a PLMN connected to both the first type of core network and the second type of core network. Then, for a PLMN supporting dual core networks, specific information may be additionally provided in the PLMN indication information to indicate whether the PLMN is preferentially connected to the second type core network or the first type core network.

That is, further, the PLMN indication information further includes: the priority core network indicating information is used for indicating a priority core network of a PLMN connecting a first type core network and a second type core network, and the priority core network is the first type core network or the second type core network. That is, the PLMN supporting the dual-core network is indicated by the "priority core network indication information" to be preferentially connected with the second type core network or the first type core network, so that the terminal can select the PLMN matched with the terminal according to the core network to be accessed.

Specifically, for example, if two core networks, i.e. 4G and 5G, can be connected to PLMN 2 and PLMN 3, 2 bits of information 10 are additionally provided, where 1 indicates that the 5G core network is high priority, and 0 indicates that the 4G core network is high priority. For 10, it means that the 5G core network of PLMN 2 is high priority, and the 4G core network of PLMN 3 is high priority.

Further, the PLMN indication information further includes: a tracking area code under each PLMN and/or a cell identification under each PLMN. That is, the base station may also provide Tracking Area Codes (TAC) under each PLMN and an identifier of the cell while broadcasting PLMN information connected to the first type core network and PLMN information connected to the second type core network. I.e. different PLMNs, which may be different or the same, depending on the planning and deployment of the operator. The TAC under each PLMN is broadcasted to the terminal, so that interaction with a network side is not needed as long as the terminal moves within the TAC range, and the network can directly page the terminal within the TAC range, so that the effectiveness is higher. And aiming at the same cell, different cell identifiers are allocated to each PLMN, so that the operators can not interfere with each other without negotiation. That is, the embodiment of the present invention fully considers the network sharing scenario, so that different operators can flexibly deploy and use the same lte base station without being tightly coupled with other operators.

Step 42: and receiving the information of the target PLMN which is selected by the terminal according to the PLMN indication information and is matched with the terminal, and determining a target core network to which the terminal is accessed according to the information of the target PLMN.

After the PLMN indication information of the base station is sent to the terminal in step 41, the terminal performs PLMN selection according to the received PLMN indication information, so as to select a PLMN matched with itself (i.e., matched with an SIM card installed in itself).

Specifically, after receiving the PLMN indication information of the base station, the terminal forwards all information related to the PLMN that the terminal can recognize to a Non-access stratum (NAS for short). If the terminal is a conventional 4G terminal, the terminal can only identify the first PLMN list or the third PLMN list mentioned above, and select a suitable PLMN from the identified PLMN list; if the terminal is an lte-capable terminal, the above-mentioned first PLMN list, second PLMN list, and indication information of the priority core network of the PLMN capable of dual core network, or the above-mentioned third PLMN list, indication information of the third PLMN list, fourth PLMN list, and indication information of the priority core network of the PLMN capable of dual core network may be identified.

When the NAS selects a target PLMN, it notifies an access stratum (AS for short), and the AS selects a suitable cell under the PLMN to camp on, so that the terminal initiates access and sends the information of the selected target PLMN to the base station when connecting to the network.

If the target PLMN selected by the terminal only supports one core network, the base station can determine the core network to which the terminal is accessed directly according to the target PLMN.

In addition, if the target PLMN selected by the terminal supports dual core networks, the terminal further needs to indicate whether a second type core network needs to be accessed, that is, the terminal needs to inform the base station which core network of the dual core networks supported by the target PLMN the terminal needs to access while sending the information of the target PLMN to the base station.

When the target PLMN is connected with the first type core network and the second type core network, the information of the target PLMN comprises second indication information used for indicating that the target PLMN is connected with the first type core network and the second type core network;

Therefore, when the target PLMN selected by the terminal supports dual-core networks, the base station needs to determine whether the target core network to be accessed by the terminal is the first-type core network or the second-type core network according to the received "second indication information for indicating that the target PLMN is connected to the first-type core network and the second-type core network" and "third indication information for indicating whether the terminal needs to access the second-type core network". Specifically, if the third indication information indicates that the terminal needs to access the second type core network, the target core network is the second type core network; and if the third indication information indicates that the terminal does not need to access the second type core network, the second indication information indicates that the target PLMN also supports the first type core network, and the target core network is the first type core network.

Step 43: and interacting with the target core network and the terminal to enable the terminal to access the target core network through the target PLMN.

After determining the target core network to which the terminal is to access through step 42, the base station makes the terminal access the target core network through the target PLMN through interaction with the target core network and the terminal.

Further, preferably, the method further comprises:

I.e. the terminal may report the information of the preferred networks, i.e. preferred PLMNs, and the preferred core network, e.g. the second type core network where the user has set that the preferred network is a certain PLMN, when or after accessing the network. When the terminal is about to move out of the current base station and the base station prepares a target base station to be switched for the terminal, the base station can select a proper target base station and a proper target network for the terminal by referring to the network information reported by the terminal and personally preferred by the user. If the target base station supports the target network which is liked by the terminal, preparing corresponding resources and configuration for the target base station, wherein the corresponding resources and configuration comprise confirming whether the target core network accommodates the user or not and the like. And after the target base station selects the determined target network and the target cell, the target base station feeds back the relevant switching command to the original base station so that the terminal can be switched to the target base station.

In summary, in the embodiments of the present invention, the base station sends the PLMN information connected to the first type core network and the PLMN information connected to the second type core network to the terminal, so that the terminal selects a target PLMN matched with the terminal from the PLMNs, and further determines the core network accessed by the terminal according to the target PLMN selected by the terminal. Therefore, the embodiment of the invention solves the problem that the accessed core network cannot be selected when the terminal is accessed to the network in the network architecture of the dual-core network in the prior art.

Therefore, the embodiment of the invention provides a solution for the situation that the eLTE base station is connected to two core networks, so that the base station can serve not only the original 4G terminal but also an enhanced terminal supporting 5G NAS, thereby ensuring that the evolved transition network can be compatible with terminals of various systems, and smoothly obtaining services from the network. In addition, the embodiment of the invention also fully considers the network sharing scene, so that different operators can flexibly deploy and use the same eLTE base station without being closely coupled with other operators for deployment.

Second embodiment

As shown in fig. 5, an embodiment of the present invention provides a method for a terminal to access a core network, which specifically includes the following steps:

step 51: and receiving PLMN indication information of the base station sent by the base station.

In addition, for the specific receiving form of the PLMN information connected to the first type core network and the PLMN information connected to the second type core network, the following two ways may be performed:

the first method is as follows: preferably, step 51 comprises: receiving a first PLMN list and a second PLMN list sent by a base station, wherein the first PLMN list comprises PLMN information connected with a first type core network, and the second PLMN list comprises PLMN information connected with a second type core network.

The second method comprises the following steps: preferably, step 51 comprises:

receiving a third PLMN list, first indication information of the third PLMN list and a fourth PLMN list sent by a base station; the third PLMN list comprises PLMN information only connected with a first type core network and PLMN information connected with the first type core network and a second type core network; the first indication information is used for indicating whether the PLMN in the third PLMN list is connected with a second type core network; and the fourth PLMN list comprises PLMN information only connected with a second type core network.

The third PLMN list may be an existing PLMN list, and the fourth PLMN list is a newly added PLMN list. Namely, the information of the PLMN connected to the first type core network and the information of the PLMN connected to the two core networks, i.e., the first type core network and the second type core network, are carried by the existing PLMN list, and an individual bitmap is added to indicate whether each PLMN corresponding to the list is connected to the second type core network, and an individual list is added to carry the information of the PLMN only connected to the second type core network.

Further, the PLMN indication information further includes: a tracking area code under each PLMN and/or a cell identification under each PLMN. That is, the base station may also provide the TAC under each PLMN and the identity of the cell while broadcasting the PLMN information connected to the first type core network and the PLMN information connected to the second type core network. I.e. different PLMNs, which may be different or the same, depending on the planning and deployment of the operator. The TAC under each PLMN is broadcasted to the terminal, so that interaction with a network side is not needed as long as the terminal moves within the TAC range, and the network can directly page the terminal within the TAC range, so that the effectiveness is higher. And aiming at the same cell, different cell identifiers are allocated to each PLMN, so that the operators can not interfere with each other without negotiation. That is, the embodiment of the present invention fully considers the network sharing scenario, so that different operators can flexibly deploy and use the same lte base station without being tightly coupled with other operators.

Step 52: and selecting a target PLMN matched with the terminal according to the PLMN indication information.

After receiving the PLMN indication information of the base station in step 51, the terminal performs PLMN selection according to the received PLMN indication information, so as to select a PLMN matched with itself (i.e., matched with an installed SIM card).

Specifically, after receiving the PLMN indication information of the base station, the terminal forwards all information related to the PLMN that the terminal can recognize to the NAS. If the terminal is a conventional 4G terminal, the terminal can only identify the first PLMN list or the third PLMN list mentioned above, and select a suitable PLMN from the identified PLMN list; if the terminal is an lte-capable terminal, the above-mentioned first PLMN list, second PLMN list, and indication information of the priority core network of the PLMN capable of dual core network, or the above-mentioned third PLMN list, indication information of the third PLMN list, fourth PLMN list, and indication information of the priority core network of the PLMN capable of dual core network may be identified.

When the NAS selects the target PLMN, the NAS informs an AS, and the AS selects a proper cell under the PLMN for residing, so that the information of the selected target PLMN is sent to a base station when the terminal initiates access and is connected to a network.

Step 53: and sending the information of the target PLMN to the base station.

The information of the target PLMN may be sent to the base station as information carried in a Radio Resource Control (RRC) connection establishment request message or an RRC connection establishment complete message.

In addition, if the target PLMN selected by the terminal only supports one core network, the base station can determine the core network to be accessed by the base station directly according to the target PLMN.

If the target PLMN selected by the terminal supports dual core networks, the terminal further needs to indicate whether the second type core network needs to be accessed, that is, the terminal needs to inform the base station which core network of the dual core networks supported by the target PLMN the terminal needs to access while sending the information of the target PLMN to the base station.

That is, preferably, when the target PLMN is connected to the first type core network and the second type core network, the information of the target PLMN includes second indication information for indicating that the target PLMN is connected to the first type core network and the second type core network; step 53 comprises:

Preferably, the method further comprises:

reporting information of a preferred PLMN supported by the terminal and a preferred core network to the base station, so that when the terminal moves out of the base station, the base station selects a target base station supporting the preferred PLMN and the preferred core network for the terminal, and informs the target base station of performing resource configuration for the terminal, so that the terminal is switched to the target base station; wherein the preferred core network is a first type core network or a second type core network.

Third embodiment

As can be seen from the first and second embodiments, the method for accessing the core network by the terminal according to the embodiment of the present invention may be executed between the terminal and the base station according to fig. 6:

step 61: and the base station broadcasts and sends PLMN indication information, wherein the PLMN indication information comprises PLMN information connected with a first type core network and PLMN information connected with a second type core network, the first type core network is a 4G core network, and the second type core network is a 5G core network.

Step 62: and the terminal NAS selects the PLMN and informs the AS to select the cell under the target PLMN for residing.

And step 63: and informing the base station of the information of the selected target PLMN in the RRC connection establishment process.

Step 64: and the base station establishes connection with the corresponding core network according to the information of the selected target PLMN provided by the terminal.

As can be seen from the above, in the embodiment of the present invention, the base station sends the PLMN information for connecting the first type core network and the PLMN information for connecting the second type core network to the terminal, so that the terminal selects a target PLMN matched with the terminal from the PLMNs, and further determines the core network to which the terminal is accessed according to the target PLMN selected by the terminal, thereby solving the problem in the prior art that the terminal cannot select the accessed core network when accessing the network in the network architecture of the dual core networks.

Fourth embodiment

An embodiment of the present invention provides a base station, as shown in fig. 7, the base station 700 includes:

an indication information sending module 701, configured to send PLMN indication information of a base station to a terminal, where the PLMN indication information includes PLMN information connected to a first type core network and PLMN information connected to a second type core network;

a target core network determining module 702, configured to receive information of a target PLMN, which is selected by the terminal according to the PLMN indication information and matches the terminal, and determine a target core network to which the terminal is to access according to the information of the target PLMN;

an access module 703 is configured to interact with the target core network and the terminal, so that the terminal accesses the target core network through the target PLMN.

Preferably, the indication information sending module 701 includes:

Preferably, the PLMN indication information further includes: the priority core network indicating information is used for indicating a priority core network of a PLMN connecting a first type core network and a second type core network, and the priority core network is the first type core network or the second type core network.

Preferably, the PLMN indication information further includes: a tracking area code under each PLMN and/or a cell identification under each PLMN.

Preferably, when the target PLMN is connected to the first type core network and the second type core network, the information of the target PLMN includes second indication information for indicating that the target PLMN is connected to the first type core network and the second type core network;

the target core network determining module 702 includes:

Preferably, the base station 700 further includes:

For the modules and units included in the base station, the functions of the modules and units may be implemented by the same entity device or different entity devices.

Fifth embodiment

An embodiment of the present invention further provides a terminal, as shown in fig. 8, where the terminal 800 includes:

an indication information receiving module 801, configured to receive PLMN indication information of a base station sent by the base station, where the PLMN indication information includes PLMN information connected to a first type core network and PLMN information connected to a second type core network;

a PLMN selection module 802, configured to select a target PLMN matched with the terminal according to the PLMN indication information;

a feedback information sending module 803, configured to send the information of the target PLMN to the base station.

Preferably, the indication information receiving module 801 includes:

the feedback information sending module 803 is specifically configured to:

Preferably, the terminal 800 further includes:

For the modules and units included in the terminal, the functions of the modules and units may be implemented by the same entity device or different entity devices.

Sixth embodiment

As shown in fig. 9, an embodiment of the present invention provides a base station, including: a first memory 920, a first processor 900 and a computer program stored on the first memory 920 and executable on the processor; a first processor 900, configured to read a program in the first memory 920, control the first transmitter 910 to send PLMN indication information of a base station to a terminal, and receive information of a target PLMN, which is selected by the terminal according to the PLMN indication information and is matched with the terminal, so that the first processor 900 determines a target core network to which the terminal is to access according to the information of the target PLMN, and further interacts with the target core network and the terminal, so that the terminal accesses the target core network through the target PLMN, where the PLMN indication information includes PLMN information connected to a first type core network and PLMN information connected to a second type core network.

Where in fig. 9 the bus architecture may include any number of interconnected buses and bridges, in particular one or more processors represented by the first processor 900 and various circuits of the memory represented by the first memory 920 are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The first transceiver 910 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The first processor 900 is responsible for managing a bus architecture and general processing, and the first memory 920 may store data used by the first processor 900 when performing operations.

When the first transceiver 910 sends the PLMN indication information of the base station to the terminal, the first transceiver is specifically configured to:

Wherein, the PLMN indication information further includes: the priority core network indicating information is used for indicating a priority core network of a PLMN connecting a first type core network and a second type core network, and the priority core network is the first type core network or the second type core network.

Wherein, the PLMN indication information further includes: a tracking area code under each PLMN and/or a cell identification under each PLMN.

When the target PLMN is connected with a first type core network and a second type core network, the information of the target PLMN comprises second indication information used for indicating that the target PLMN is connected with the first type core network and the second type core network; the first transceiver 910 receives information of a target PLMN selected by the terminal according to the PLMN indication information and matched with the terminal, so that when the first processor 900 determines the target core network to which the terminal is to access according to the information of the target PLMN, the first transceiver is specifically configured to:

the first transceiver 910 receives information of a target PLMN selected by the terminal according to the PLMN indication information and matching the terminal, and third indication information for indicating whether the terminal needs to access a second type core network;

the first processor 900 determines a target core network to which the terminal is to access according to the third indication information and the second indication information included in the information of the target PLMN.

Wherein the first transceiver 910 is further configured to: receiving information of a preferred PLMN supported by the terminal and a preferred core network reported by the terminal, wherein the preferred core network is a first type core network or a second type core network; therefore, when the terminal moves out of the base station, the first processor 900 is triggered to control the base station to select a target base station supporting the preferred PLMN and the preferred core network, and notify the target base station to perform resource configuration for the terminal, so that the terminal is switched to the target base station.

Seventh embodiment

In order to better achieve the above object, as shown in fig. 10, the present invention also provides a terminal comprising:

a second processor 1010; a second memory 1030 connected to the second processor 1010 through a bus interface 1020, the second memory 1030 configured to store programs and data used by the second processor 1010 in performing operations, and a second transceiver 1040 connected to the second processor 1010 through the bus interface 1020 configured to receive and transmit data under the control of the second processor 1010.

The second transceiver 1040 is configured to receive PLMN indication information of the base station sent by the base station, so that the second processor 1010 selects a target PLMN matched with the terminal according to the PLMN indication information, and further triggers the second transceiver 1040 to send information of the target PLMN to the base station, where the PLMN indication information includes PLMN information connected to a first type core network and PLMN information connected to a second type core network.

The second transceiver 1040, when receiving the PLMN indication information of the base station sent by the base station, is specifically configured to:

When the target PLMN is connected with a first type core network and a second type core network, the information of the target PLMN comprises second indication information used for indicating that the target PLMN is connected with the first type core network and the second type core network; when the second transceiver 1040 is configured to send the information of the target PLMN to the base station, specifically:

Wherein the second transceiver 1040 is further configured to: reporting information of a preferred PLMN supported by the terminal and a preferred core network to the base station, so that when the terminal moves out of the base station, the base station selects a target base station supporting the preferred PLMN and the preferred core network for the terminal, and informs the target base station of performing resource configuration for the terminal, so that the terminal is switched to the target base station;

It should be noted that in fig. 10, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by the second processor 1010 and various circuits of memory represented by the second memory 1030 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The second transceiver 1040 may be a plurality of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. For different terminals, the user interface 1050 may also be an interface capable of interfacing with a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The second processor 1010 is responsible for managing the bus architecture and general processing, and the second memory 1030 may store data used by the second processor 1010 in performing operations.

Those skilled in the art will appreciate that all or part of the steps for implementing the above embodiments may be performed by hardware, or may be instructed to be performed by associated hardware by a computer program that includes instructions for performing some or all of the steps of the above methods; and the computer program may be stored in a readable storage medium, which may be any form of storage medium.

Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

Eighth embodiment

Wherein, the step of sending the public land mobile network PLMN indication information of the base station to the terminal comprises:

When the target PLMN is connected with a first type core network and a second type core network, the information of the target PLMN comprises second indication information used for indicating that the target PLMN is connected with the first type core network and the second type core network;

Wherein the method further comprises:

Ninth embodiment

and sending the information of the target PLMN to the base station.

Wherein, the step of receiving the PLMN indication information of the base station sent by the base station includes:

Wherein the method further comprises:

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. A method for accessing a terminal to a core network is characterized by comprising the following steps:

interacting with the target core network and the terminal to enable the terminal to access the target core network through the target PLMN;

2. The method of claim 1, wherein the step of sending the Public Land Mobile Network (PLMN) indication information of the base station to the terminal comprises:

3. The method of claim 1, wherein the step of sending the Public Land Mobile Network (PLMN) indication information of the base station to the terminal comprises:

4. The method of claim 1, wherein the PLMN indication information further comprises: the priority core network indicating information is used for indicating a priority core network of a PLMN connecting a first type core network and a second type core network, and the priority core network is the first type core network or the second type core network.

5. The method of claim 1, wherein the PLMN indication information further comprises: a tracking area code under each PLMN and/or a cell identification under each PLMN.

6. The method of claim 1, further comprising:

7. A method for accessing a terminal to a core network is characterized by comprising the following steps:

sending the information of the target PLMN to the base station;

8. The method of claim 7, wherein the step of receiving the PLMN indication information of the base station sent by the base station comprises:

9. The method of claim 7, wherein the step of receiving the PLMN indication information of the base station sent by the base station comprises:

10. The method of claim 7, wherein the PLMN indication information further comprises: the priority core network indicating information is used for indicating a priority core network of a PLMN connecting a first type core network and a second type core network, and the priority core network is the first type core network or the second type core network.

11. The method of claim 7, wherein the PLMN indication information further comprises: a tracking area code under each PLMN and/or a cell identification under each PLMN.

12. The method of claim 7, further comprising:

13. A base station, comprising:

an access module, configured to interact with the target core network and the terminal, so that the terminal accesses the target core network through the target PLMN;

the target core network determining module comprises:

14. The base station of claim 13, wherein the indication information sending module comprises:

15. The base station of claim 13, wherein the indication information sending module comprises:

16. The base station of claim 13, wherein the PLMN indication information further comprises: the priority core network indicating information is used for indicating a priority core network of a PLMN connecting a first type core network and a second type core network, and the priority core network is the first type core network or the second type core network.

17. The base station of claim 13, wherein the PLMN indication information further comprises: a tracking area code under each PLMN and/or a cell identification under each PLMN.

18. The base station of claim 13, wherein the base station further comprises:

19. A terminal, comprising:

a feedback information sending module, configured to send the information of the target PLMN to the base station;

the feedback information sending module is specifically configured to:

20. The terminal of claim 19, wherein the indication information receiving module comprises:

21. The terminal of claim 19, wherein the indication information receiving module comprises:

22. The terminal of claim 19, wherein the PLMN indication information further comprises: the priority core network indicating information is used for indicating a priority core network of a PLMN connecting a first type core network and a second type core network, and the priority core network is the first type core network or the second type core network.

23. The terminal of claim 19, wherein the PLMN indication information further comprises: a tracking area code under each PLMN and/or a cell identification under each PLMN.

24. The terminal of claim 19, wherein the terminal further comprises:

25. A base station comprising a first memory, a first processor and a computer program stored on the first memory and executable on the first processor; wherein the first processor implements the following steps when executing the program:

the receiving the information of the target PLMN which is selected by the terminal according to the PLMN indication information and is matched with the terminal, and determining the target core network to which the terminal is accessed according to the information of the target PLMN comprises the following steps:

26. A terminal comprising a second memory, a second processor and a computer program stored on the second memory and executable on the second processor; wherein the second processor implements the following steps when executing the program:

sending the information of the target PLMN to the base station;

the sending the information of the target PLMN to the base station includes:

27. A computer-readable storage medium, on which a computer program is stored, which program, when executed by a processor, carries out the steps of:

28. A computer-readable storage medium, on which a computer program is stored, which program, when executed by a processor, carries out the steps of:

sending the information of the target PLMN to the base station;